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vNAS reports each aircraft's height above ground at 1 Hz. The timeline now carries it to the displayed instant, desktop and remote browsers alike, and the interpolation turns it into ground contact (in below 3 ft, out above 5 ft): in contact the aircraft sits on the sampled terrain, airborne it is drawn at the reported height. The vNAS 50/80 ft ground flag stays for labels; an observation without a height gives no drawing ground flag, so old replays keep the landing blends. The gear is down in contact and retracts once per contact on positive climb after 2 s out of contact, over 8 s; the 150 ft rule takes over above 150 ft, after a backward seek, and for aircraft never seen in contact. The motion suite covers contact, the gear rule, the height and heightless vNAS feeds. Refs: TC3D-50 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A vNAS aircraft on the ground whose last measured steps are under 2 kt is drawn at its last sample while vNAS is quiet, with no extrapolation, and the silent gap is left out of the display-delay statistics, so a line-up wait no longer raises the delay and the takeoff roll after it plays at 1x. The stop test measures speed between vNAS samples (the last step within 3 s, plus the step before or a 3-6 s window), never the windowed groundspeed, and is cached per sample. STOPPED_SPEED_KTS and the contact heights are shared through @/constants. Refs: TC3D-51 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Aircraft motion model work, landed item by item on this branch and merged to
mainonce every item below is in and the live check passes.Refs TC3D-252